v0.1.1

• Add menus : Added a main menu with 'Start' and 'Quit' buttons. Also display info about the program like when it was created (birthday), who created it (me) and the current version.
• Add parameters icon : Placed in the up right corner of the screen, user can click on it to open the parameters menu and click again elsewhere to close it.
• Add parameters tabs : Added tabs on parameters screen to sort parameters in different categories. The tabs are 'main', 'simulation', 'entities' and 'sounds'. The tabs 'main' and 'sounds' are still a work in progress.
• Add auto_end parameter : This parameter automatically ends current simulation if only one type remaining after 2 secs. Also display a message to inform the user which entity wan.